1. It must be so small that present methods of psychiatric diagnosis cannot find it.
    这一定很小, 目前精神病的诊断方法还发现不了.

2. It must be so small that present methods of psychiatric diagnosis cannot find it.
    那也一定是微乎其微，以致现代的精神病诊断方法还发现不了。

3. More and more, doctors will use visual information about your condition from computers, instead of textbooks, for diagnosis and treatment.
    医生们将不再依靠教科书，而是越来越多地运用来自电脑的有关病人身体状况的直观信息进行诊断和治疗。